From f7d2a43707a765fd99dea21913b3616b7559d9e6 Mon Sep 17 00:00:00 2001
From: Kostya Shishkov <kostya.shishkov@gmail.com>
Date: Sat, 15 Sep 2007 09:23:58 +0000
Subject: [PATCH] In case when any quantizer may occur, HALFPQ should be zero

Originally committed as revision 10499 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 libavcodec/vc1.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libavcodec/vc1.c b/libavcodec/vc1.c
index f273422293..4f19dc29fe 100644
--- a/libavcodec/vc1.c
+++ b/libavcodec/vc1.c
@@ -342,6 +342,8 @@ static int vop_dquant_decoding(VC1Context *v)
                 break;
             case DQPROFILE_ALL_MBS:
                 v->dqbilevel = get_bits1(gb);
+                if(!v->dqbilevel)
+                    v->halfpq = 0;
             default: break; //Forbidden ?
             }
             if (v->dqbilevel || v->dqprofile != DQPROFILE_ALL_MBS)